Borovicka et al. Collection of Czechoslovak Chemical Communications, 1955 , vol. 20, p. 437,448 Chem.Abstr., 1956 , p. 1639 Full Text Show Details Borovicka et al. Chemicke Listy, 1955 , vol. 49, p. 231,241 Collection of Czechoslovak Chemical Communications, 1955 , vol. 20, p. 437,449 Chem.Abstr., 1956 , p. 1639,1640